Improvement in paper-cutting machines



" E. scHLEjNKER. `P'AMza-c:UTTING MACHINES.

Nofgglzgq, Patented sept. 12, 1.8mg

RFETERS. PHOTO-LITHOGRPHER, wASHbNGTuN. D. C.

Urrnn ATatras PATEN `|wlPRcrivEwIENT IN PAPER-CUTTING MACHINES.-

:Specication forming part of Letters Patent'No. 182,230, dated September 12, 1876; application filed June 6, 1876.

Toall who-m it may concern: v

f Be it "known that I', ERH'AR'D SGHLENKER, of the city of Buffalo, in the lcounty of Erie and State of New York, have invented Im-4 provements in PaperfQutting Machines, of which the following isa specification rIhe nature and object of my invention islto attach to an ordinary paper-cutting machine a self-actin g clamp, operated through friction,

cient for this purpose, and not to consume` power. I also attach to said clamp an indicator for adjusting the paper, so that the opl erator can tell where it will be cut before the power is applied.

In the drawings hereto annexed and hereby referred to, Figure lis an elevation of a paper-cutting machine showing my improvements. Fig. 2 is an end view of the same. Fig. 3 is a sectional view, internal through the center ofthe circular plates,as arranged to cause friction. FigA: represents one of the plates.

. Fig. 5 represents the indicator, by which the paper is adjusted, and to show where the paper will be cut. Fig. 6 is a side view ofthe same; and Fig. 7 represents the rack and pinion forming the connection between the shaft and clamp.

My improvements can be attached to ordinary paper-cutting machines, and I will not describe any one in particular, although the drawings, Figs. 1 and 2, represent a paper-cutting machine, and shall confine myself toa descripy tion 0f my improvements.

I attach a connecting-rod to the same lever that transmits the movementto the knife, so

that the power moving the devices that cause the friction to operate the clamp, and that operates the knife, are the same. This rod is represented by letter a, and is connected with the circular plate, letter b, so asto revolve the same. Saidplate b has three pawlsupon the inner side` letter k. Next to plate?) is another plate of same size, letter c, upon` the face Vof which, next to plate b, are ratchets,'letter e, with whichisaid pawls engage. Thevopposite face of plate c is sunk, so as to receive asmall- A erfplate,fletter l, which is made fast to the shaft,l letter f, and this plate, letter l. is also g sunk into the next plate', represented by letter g, and between said plates leather or other yielding material is inserted, so as to cause a yielding friction, and said plates are bolted together, so`as to increase or lessen the friction, as desired, and to compensate for the wear. The other plate, into which plate lis partly countersunk, is also loose upon the shaft, as well as plates b and c, and said shaft is connected to the clamp by means of section-V al pinions and rack at one end, and near said plates at the other, which operate the clamp.

lShaftj' extends across the machine, and runs in two journals attached to the frame of said machine, and inside of said journals are two sectional or quarter-gear pinions, letters It h, which are made fast to said shaft, and which gear into two corresponding racks, which are fastened to the clamp-bar, letter `Said racks l-remainvstationary, and hold the clamp and l paper with great force, and the yieldingfriction between the plates or other devices which may be substituted will be maintained, holding the clamp and paper, but allowing the knife to continue its movement until the paper is cut.

In order to carry the clamp back into position, Abut not so high as the knife moves, I arrange for friction sufficient for the purpose without using the great friction to hold the paper, by securing friction between the hub upon the outer face of plate b and the washer o, which is held in place by a nut and jam-nut, m, and as soon as the clamp is carried to its Y extreme height, then the dogs or pawls and ratchet, letters lc and e, slip, and the knife is carried to its proper height.

Upon the inside face of the clamp-bar, and next to the cutting-knife, I place what I call an indicator, secured' to the clamp-bar, which I make out of a piece of fiat metal, with a small handle, with a spring of steel Wire to cause it to return to its place. Before applying power to cut the paper the same is adjusted by means of this indicator being pushed down upon the paper, whereby the paper can be properly adjusted, and the operator can tell Where the paper-will be cut before the power to operate the knife and clamp is applied. This indicator is lettered n, Figs. 5 and 6. v

In operating the machine, plate b, beingloose upon shaft, moves, when motion is given to the knife, about one-quarter of a circle. and, by

means of the dogs or pawls 7c and ratchet, and the connection with the other plates and with an internal plate,`l, bein g fast to the shaft which is connected with the cla-mp, the said-clamp is operated to hold the paper till cut, and is then raised to its place by the friction between the hub and washer of plate b.

clamp i, substantially as and for the purpose i specified.

3. The combination of the disks b c g with disk l, shaft f, Washer'o,1jainnut m, and `With the clamp i and connecting-rod a, substantially as and for the purpose specified.

4. The indicator n, constructed'substantial-- lyas described, and arranged tooperate in combination with the clamp z', for the purpose specified.

ERHARD soHLE'NKER.

Witnesses HENRY BULL, P. P. BURTIs. 

